Commencement of Well Operations at Skua-11 and Production Update

31 March 2025 – Singapore: Jadestone Energy plc (AIM:JSE) (“Jadestone” or the “Company”), an independent upstream production and development company focused on the Asia-Pacific region, announces that the Valaris 247 jack-up rig has arrived on location at the Montara field offshore Australia to drill the Skua-11 well side-track (“Skua-11ST”).

Skua-11ST is the main activity in Jadestone’s 2025 capital program. Operations will cover safe decommissioning of the existing SK-11 well, after which a side-track will be drilled higher in the Skua structure to accelerate the recovery of reserves from this field. The Skua-11ST program is expected to take c.60 days to complete, with an expected initial oil rate of c.3,500 bbls/d when brought onstream and extending the economic life of the Montara field by one year. The well is expected to cost US$62 million, with a forecast payback period of 16 months and generate a 65% internal rate of return[1].

Adel Chaouch, Executive Chairman of Jadestone, commented:

“We are looking forward to executing drilling operations at Skua-11 safely and efficiently. Bringing this well back into production will add to the positive operational momentum we have seen so far in 2025, with Group production year to date averaging c.21,000 boe/d, slightly ahead of expectations, even after cyclone related downtime in Australia early in the year. The emphasis on high uptime and stable operations is beginning to pay off, as we focus on demonstrating delivery against targets.”

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About Jadestone Energy

Jadestone Energy plc is an independent upstream company focused on the Asia-Pacific region. It has a balanced and increasingly diversified portfolio of production and development assets in Australia, Malaysia, Indonesia, Thailand and Vietnam, all stable jurisdictions with a positive upstream investment climate.

The Company is pursuing a strategy to grow and diversify the Company’s production base both organically, through developments such as at Akatara in Indonesia, Nam Du/U Minh in Vietnam and the Puteri Cluster offshore Malaysia, as well as through acquisitions that fit within Jadestone’s financial framework and play to the Company’s strengths in managing maturing oil assets. Jadestone delivers value in its acquisition strategy by enhancing returns through operating efficiencies, cost reductions and increased production through further investment.

Jadestone is a responsible operator and well positioned for the energy transition through its increasing gas production, by maximising recovery from existing brownfield developments and through its Net Zero pledge on Scope 1 & 2 GHG emissions from operated assets by 2040. This strategy is aligned with the IEA Net Zero by 2050 scenario, which stresses the necessity of continued investment in existing upstream assets to avoid an energy crisis and meet demand for oil and gas through the energy transition.

Jadestone Energy plc (LEI: 21380076GWJ8XDYKVQ37) is listed on the AIM market of the London Stock Exchange (AIM: JSE).  The Company is headquartered in Singapore.  For further information on the Company please visit www.jadestone-energy.com.

This announcement does not contain inside information.

[1] Based on a Brent oil price assumption of US$80/bbl in 2025, US$77/bbl in 2026 and US$81/bbl in 2027 and escalated at 2% p.a. thereafter